If you are using an external integration which also generates a password for your users, you may wish to disable the automatic registration email which prompts all new users on your site to click a link to setup a password for their account
By default, this is a WordPress function which cannot be disabled within the normal admin options of WordPress or OptimizeMember
We have found an external plugin which appears to disable this email. The plugin is detailed below
Plugin Name: Disable New User Notification
Plugin Creator: RocaPress
https://wordpress.org/plugins/disable-new-user-notification/
You can find this plugin by going to Plugins > Add new and search the WordPress plugin library for this free plugin
Important Notes
We cannot provide support or guarantees of functionality with external plugins so please test your site thoroughly if using an external plugin such as this